6种药剂对唐山秋瓜霜霉病的防治效果比较

为确定防治唐山秋瓜霜霉病的最佳药剂，以清水作对照，对6种供试药剂进行了防治效果比较试验。结果表明：6种药剂均对唐山秋瓜生长安全，且均对唐山秋瓜霜霉病具有一定的防治效果，其中，阿米西达（120 g/hm2）对唐山秋瓜霜霉病的防治效果始终在90％以上，防效最好，且药效持续时间最长；72％克露WP （540 g/hm2）和大生M-4580％WP （900 g/hm2）防效次之，对霜霉病的防治效果始终维持在80％以上。建议在生产上各供试药剂轮换交替使用，以延缓唐山秋瓜霜霉病抗药性的产生。

The Control Effect Comparison of Six Kinds of Fungicides on the Downy Mildew of Tangshan Autumn Cucumber

Taking clean water as the contrast, the control effects of six kinds of fungicides was tested to determine the best medicament to control downy mildew of Tangshan autumn cucumber.The results showed that six kinds of tested fungicides were safety to the growth of Tangshan autumn cucumber , and they all had a certain control effect on the Tangshan autumn cucumber downy mildew.Azoxystrobin （120 g/hm2） had the best control effect on the Tangshan autumn cucumber downy mildew , its control effect always above 90%, followed by 64% mancozeb 8%cymoxanil WP （ 540 g/hm2 ） and 80% mancozeb WP （ 900 g/hm2 ） , their control effect were always above 80%.It was suggested that all of the tested fungicides should be used altermately to delay the drug resistance of Tangshan autumn cucumber downy mildew in production.